New Powertrain Piston Skirt Coating Increases Durability for the Life of Pistons

April 4, 2016



Federal-Mogul Powertrain, a division of Federal-Mogul Holdings Corporation, has introduced two innovative piston skirt coatings, EcoTough-D for diesel engines and EcoTough New Generation for gasoline engines.

EcoTough-D has been developed for both aluminum and steel diesel pistons in passenger cars and commercial vehicles. Taking advantage of the greater structural stiffness of diesel pistons and the superior lubricity of diesel fuel, Federal-Mogul Powertrain can specify a different formulation to deliver greater improvements in friction levels. EcoTough-D is a polymer-based coating reinforced with short carbon fibers and contains graphite embedded as a solid lubricant. The EcoTough-D coating reduces piston friction by as much as 35 percent compared to conventional coatings in the market. Wear resistance is also improved by up to 30 percent.

“The piston skirt and piston pin alone account for around 17 percent of the frictional losses in an engine,” said Dr. Frank T.H. Dörnenburg, Head of Technology, Global Pistons at Federal-Mogul Powertrain. “Skirt coatings have proved to be an effective way of meeting the interrelated targets of reduced friction and wear between piston skirt and cylinder surfaces, used in combination with optimum piston clearance and skirt geometry. Application of the piston skirt coatings using a fully automated, large-scale production process means that the excellent wear and friction properties can be achieved within economical cost targets.”

EcoTough-D should be on the market in 2017.

Source: Federal-Mogul Powertrain